Comb Binding Machine is designed to fit letter size A4, offering an easy-to-use solution for binding documents, files, and contracts. This 21-hole Book Binder features adjustable margins, making it ideal for home or office use with a capacity of binding up to 450 sheets.Product Features:Easy to Use: The 21-hole book binder comes with square punch holes, with a hole spacing of 6.5mm (0.26 inches) and a hole size of 3mm x 8mm (0.12 inches x 0.31 inches). It offers adjustable margins of 3mm, 4mm, and 5mm, ensuring effortless punching.Sturdy Material: Constructed with durable metal, the binding machine is equipped with anti-slip foot pads at the bottom, ensuring a long service life.Humanized Design: Featuring a removable curved handle, the binder machine is easy to install and remove, providing labor-saving convenience. The positioning slider design allows for precise alignment and centering of paper. Additionally, the pull-out paper scrap box facilitates easy storage of paper scraps, maintaining a clean and tidy office environment.Wide Applications: Suitable for letter size A4 and A5, this binding machine can punch up to 12 sheets of 70g paper and bind up to 450 sheets of A4 paper.Specifications: Material: Metal Paper Specifications: A4, A5 Hole Punching Capacity: 12 sheets of 70g paper Binding Capacity: 450 sheets (A4) Φ51mm Number of Holes: 21 Hole Margin: 3/4/5mm adjustable Hole Spacing: 6.5mm/0.26 inch Hole Size: 3mm x 8mm/0.12 inch x 0.31 inch Package Includes:1 x Comb Binding Machine
